1. Department of Pediatrics, Calcutta National Medical College, Kolkata, India
2. Department of Pediatrics, Calcutta Medical College, Kolkata, India
3. Department of Neonatology, Institute of Post Graduate Medical Education and Research, Kolkata, India
4. Department of Pediatrics, Behrampore Medical College, Behrampore, Murshidabad, India
5. Department of Pediatrics, Krishnagar District Hospital, Nadia, India